CA3201545A1 - Rotor rim for an electric machine - Google Patents
Rotor rim for an electric machine Download PDFInfo
- Publication number
- CA3201545A1 CA3201545A1 CA3201545A CA3201545A CA3201545A1 CA 3201545 A1 CA3201545 A1 CA 3201545A1 CA 3201545 A CA3201545 A CA 3201545A CA 3201545 A CA3201545 A CA 3201545A CA 3201545 A1 CA3201545 A1 CA 3201545A1
- Authority
- CA
- Canada
- Prior art keywords
- annular plates
- rotor
- intermediate ring
- rotor rim
- tension bolts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
- H02K1/325—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium between salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Rotor rim for an electric machine having at least two solid annular plates (1) and a plurality of axially oriented tension bolts (3) connecting the annular plates with each other, wherein on the outer circumference of annular plates grooves are arranged for accommodating a number of rotor poles, and wherein for each rotor pole at least two tension bolts are provided, and wherein between each two adjacent annular plates a layer of intermediate ring elements (2) is arranged, wherein each layer comprises exactly one intermediate ring element per rotor pole, and wherein intermediate ring elements are arranged in such a way that between each two adjacent intermediate ring elements a ventilation duct (6) is formed which extends from the inside of the rotor rim to the outer circumference of the rotor rim where it opens into the space between the rotor poles, and wherein each intermediate ring element is penetrated by at least two tension bolts and only abuts with a part (7) of its axially oriented surface against respectively adjacent annular plates.
Description
Rotor rim for an electric machine The invention relates to a rotor for a rotating electric machine, wherein the rotor is designed as a salient-pole rotor. The electric machine may be a generator, a motor or motor-generator.
Salient pole rotors are generally constructed of solid steel and have distinct pole shoes on which the excitation winding is located. On larger machines, the pole shoes are usually attached to a solid hub by means of one or more hammerhead-like grooves.
For large machines, an arrangement has also become known in which the rotor consists of a rotor rim and a support structure, the rotor rim being connected to the shaft by means of the support structure. Such an arrangement is disclosed in CN
101752917 B. The rotor rim is made up of several annular plates stacked on top of each other. Support blocks (No. 8 in the drawings) and ventilation guide plates (No. 7 in the drawings) are arranged between the annular plates.
Another such arrangement is disclosed in CN 109921526 B, wherein the ventilation guide plates are designed as a two-part component (No. 9 and 10 in Fig. 1), and wherein one part of each ventilation guide plate is connected to the adjacent annular plates by welding. Polygonal grooves (No. 13 in Fig. 3) and protrusions (No.
14 in Fig. 3) in the adjacent annular plates serve to align the ventilation guide plates.
It is the objective of the current invention is to provide an alternative embodiment of a rotor rim for an electric machine.
According to the invention the objective is met by a design according to the independent claim. Additional advantageous embodiments of the present invention can be found in the subclaims.
The invention is discussed in further detail below with reference to drawings.
The drawings show the following details:
Fig.1 Section parallel to the axis through a rotor rim according to the invention Fig. 2 Section perpendicular to the axis of the rotor ring from Fig. 1 along A-A
Fig. 3 Section perpendicular to the axis of the rotor ring from Fig. 1 along B-B
Fig. 4 Intermediate ring element in an enlarged view Fig. 5a Intermediate ring element in an enlarged view Fig. 5b Intermediate ring element in an enlarged view Fig. 6 Section through an intermediate ring element along C-C
Fig. 7 Section through an intermediate ring element along C-C in another embodiment Fig. 8 Detail of a rotor rim according to the invention with brake disc Figure 1 shows a schematic sectional view through a rotor rim according to the invention. The rotor rim includes at least two solid annular plates, one of which is identified with the number 1. Two of the annular plates 1 are thereby positioned on the outside in axial direction and any given number (including zero) of annular plates 1 are positioned between the two outer plates. The axis of rotation of the rotor rim is indicated by the dashed line on the left. Annular plates 1 are connected together by a plurality of axially oriented tension bolts, one of which is shown and designated 3.
Figure 2 shows a schematic view of a section perpendicular to the axis through the rotor rim of Figure 1 along line A-A. The drawing shows one of the solid annular plates 1. Arranged on the outer circumference of annular plates 1 are hammerhead-like grooves which serve to accommodate the rotor poles and one of which is designated 4.
The grooves may also be shaped differently, for example as dovetails or similar. Also, several such grooves can be provided to accommodate one pole each. The rotor rim shown in Figure 2 is designed to accommodate 14 rotor poles. However, all even numbers can be considered for the number of rotor poles to be accommodated. In
Salient pole rotors are generally constructed of solid steel and have distinct pole shoes on which the excitation winding is located. On larger machines, the pole shoes are usually attached to a solid hub by means of one or more hammerhead-like grooves.
For large machines, an arrangement has also become known in which the rotor consists of a rotor rim and a support structure, the rotor rim being connected to the shaft by means of the support structure. Such an arrangement is disclosed in CN
101752917 B. The rotor rim is made up of several annular plates stacked on top of each other. Support blocks (No. 8 in the drawings) and ventilation guide plates (No. 7 in the drawings) are arranged between the annular plates.
Another such arrangement is disclosed in CN 109921526 B, wherein the ventilation guide plates are designed as a two-part component (No. 9 and 10 in Fig. 1), and wherein one part of each ventilation guide plate is connected to the adjacent annular plates by welding. Polygonal grooves (No. 13 in Fig. 3) and protrusions (No.
14 in Fig. 3) in the adjacent annular plates serve to align the ventilation guide plates.
It is the objective of the current invention is to provide an alternative embodiment of a rotor rim for an electric machine.
According to the invention the objective is met by a design according to the independent claim. Additional advantageous embodiments of the present invention can be found in the subclaims.
The invention is discussed in further detail below with reference to drawings.
The drawings show the following details:
Fig.1 Section parallel to the axis through a rotor rim according to the invention Fig. 2 Section perpendicular to the axis of the rotor ring from Fig. 1 along A-A
Fig. 3 Section perpendicular to the axis of the rotor ring from Fig. 1 along B-B
Fig. 4 Intermediate ring element in an enlarged view Fig. 5a Intermediate ring element in an enlarged view Fig. 5b Intermediate ring element in an enlarged view Fig. 6 Section through an intermediate ring element along C-C
Fig. 7 Section through an intermediate ring element along C-C in another embodiment Fig. 8 Detail of a rotor rim according to the invention with brake disc Figure 1 shows a schematic sectional view through a rotor rim according to the invention. The rotor rim includes at least two solid annular plates, one of which is identified with the number 1. Two of the annular plates 1 are thereby positioned on the outside in axial direction and any given number (including zero) of annular plates 1 are positioned between the two outer plates. The axis of rotation of the rotor rim is indicated by the dashed line on the left. Annular plates 1 are connected together by a plurality of axially oriented tension bolts, one of which is shown and designated 3.
Figure 2 shows a schematic view of a section perpendicular to the axis through the rotor rim of Figure 1 along line A-A. The drawing shows one of the solid annular plates 1. Arranged on the outer circumference of annular plates 1 are hammerhead-like grooves which serve to accommodate the rotor poles and one of which is designated 4.
The grooves may also be shaped differently, for example as dovetails or similar. Also, several such grooves can be provided to accommodate one pole each. The rotor rim shown in Figure 2 is designed to accommodate 14 rotor poles. However, all even numbers can be considered for the number of rotor poles to be accommodated. In
2 the embodiment shown in Figure 2, two tension bolts 3 are provided per pole.
However, more than two tension bolts (3) per pole can also be provided. In Figure 2, tension bolts 3 are all arranged on one and the same pitch circle around the axis of rotation of the rotor rim. Tension bolts 3 can also be arranged on several pitch circles with different radii.
Figure 2 shows optional ventilation holes which extend from the inside of annular plate 1 to the outside of same. One of these ventilation holes is identified by number 5.
On the outside, optional ventilation holes 5 open into locations between the poles. In Figure 2, one ventilation hole 5 is provided between each of two poles, but it could also be more. If several ventilation holes 5 are provided between two poles each, they can be arranged one above the other in the axial direction or adjacent to each other in the plane shown in Figure 2. Ventilation holes 5 shown in Figure 2 are oriented in radial direction. They could also be oriented in a different direction, for example, offset parallel relative to a radius. In any case, ventilation holes 5 are arranged in such a way that air can pass from the inside of the rotor rim through ventilation holes 5 into the space between two poles. As stated, ventilation holes 5 are optional. Such ventilation holes 5 may also be located in only some of the annular plate 1, for example only in the two annular plates located on the outside in the axial direction.
Base material to be considered for annular plates 1 can be steel plates or forged steel rings.
Figure 3 shows a schematic view of a section perpendicular to the axis of rotation through the rotor rim of Figure 1 along line B-B. As can be seen from the position of line B-B in Figure 1, the arrangement shown in Figure 3 is located between two annular plates 1. The arrangement shown in Figure 3 includes a number of intermediate ring elements, one of which is identified with 2. The arrangement according to Figure 3 comprises exactly one intermediate ring element 2 per pole. To
However, more than two tension bolts (3) per pole can also be provided. In Figure 2, tension bolts 3 are all arranged on one and the same pitch circle around the axis of rotation of the rotor rim. Tension bolts 3 can also be arranged on several pitch circles with different radii.
Figure 2 shows optional ventilation holes which extend from the inside of annular plate 1 to the outside of same. One of these ventilation holes is identified by number 5.
On the outside, optional ventilation holes 5 open into locations between the poles. In Figure 2, one ventilation hole 5 is provided between each of two poles, but it could also be more. If several ventilation holes 5 are provided between two poles each, they can be arranged one above the other in the axial direction or adjacent to each other in the plane shown in Figure 2. Ventilation holes 5 shown in Figure 2 are oriented in radial direction. They could also be oriented in a different direction, for example, offset parallel relative to a radius. In any case, ventilation holes 5 are arranged in such a way that air can pass from the inside of the rotor rim through ventilation holes 5 into the space between two poles. As stated, ventilation holes 5 are optional. Such ventilation holes 5 may also be located in only some of the annular plate 1, for example only in the two annular plates located on the outside in the axial direction.
Base material to be considered for annular plates 1 can be steel plates or forged steel rings.
Figure 3 shows a schematic view of a section perpendicular to the axis of rotation through the rotor rim of Figure 1 along line B-B. As can be seen from the position of line B-B in Figure 1, the arrangement shown in Figure 3 is located between two annular plates 1. The arrangement shown in Figure 3 includes a number of intermediate ring elements, one of which is identified with 2. The arrangement according to Figure 3 comprises exactly one intermediate ring element 2 per pole. To
3 more clearly show the position of intermediate ring elements 2, the outer contour of annular plate 1 is indicated by the dashed line in Figure 3. Viewed from the outside, one intermediate ring element 2 is thus arranged radially behind the associated pole.
The preceding sentence, of course, refers only to one layer of intermediate ring elements 2 as shown in Figure 3. Since, according to the invention, such a layer of intermediate ring elements 2 is arranged in each case between two adjacent annular plates 1, there are N-1 intermediate ring elements arranged radially behind each pole if, N represents the number of annular plates 1 of which the rotor rim is composed.
Each intermediate ring element 2 is penetrated by at least two tension bolts 3.
Intermediate ring elements 2 are arranged in such a way that they do not abut each other directly in the tangential direction, but rather leaving an open space.
The thus formed spaces represent ventilation ducts, one of which is designated 6.
Intermediate ring elements 2 fulfill a dual function. On the one hand, they represent spaces between each two annular plates 1 adjacent in the axial direction, and on the other hand - with their outer contours aligned laterally to adjacent intermediate ring elements 2 - they form the lateral walls of ventilation ducts 6. The axially oriented walls of ventilation ducts 6 are thereby formed by adjacent annular plates 1.
Intermediate ring elements 2 shown in Figure 3 are substantially in the shape of ring shaped segments. On the radially outer side, they deviate from this shape in that they have a recess in the region of the associated pole, so that the contour of intermediate ring elements 2 in this region does not follow the outer contour of the annular plates.
The recesses offer the advantage of easier manufacturability, as the grooves for accommodating the poles do not have to be included in the intermediate ring elements.
The recesses moreover result in weight saving. However, intermediate ring elements 2 could also deviate from the shape of ring shaped segments in other ways. For example, the outer contour of intermediate ring elements 2, which form the lateral walls of ventilation ducts 6, could be oriented in such a way that the width of the ventilation
The preceding sentence, of course, refers only to one layer of intermediate ring elements 2 as shown in Figure 3. Since, according to the invention, such a layer of intermediate ring elements 2 is arranged in each case between two adjacent annular plates 1, there are N-1 intermediate ring elements arranged radially behind each pole if, N represents the number of annular plates 1 of which the rotor rim is composed.
Each intermediate ring element 2 is penetrated by at least two tension bolts 3.
Intermediate ring elements 2 are arranged in such a way that they do not abut each other directly in the tangential direction, but rather leaving an open space.
The thus formed spaces represent ventilation ducts, one of which is designated 6.
Intermediate ring elements 2 fulfill a dual function. On the one hand, they represent spaces between each two annular plates 1 adjacent in the axial direction, and on the other hand - with their outer contours aligned laterally to adjacent intermediate ring elements 2 - they form the lateral walls of ventilation ducts 6. The axially oriented walls of ventilation ducts 6 are thereby formed by adjacent annular plates 1.
Intermediate ring elements 2 shown in Figure 3 are substantially in the shape of ring shaped segments. On the radially outer side, they deviate from this shape in that they have a recess in the region of the associated pole, so that the contour of intermediate ring elements 2 in this region does not follow the outer contour of the annular plates.
The recesses offer the advantage of easier manufacturability, as the grooves for accommodating the poles do not have to be included in the intermediate ring elements.
The recesses moreover result in weight saving. However, intermediate ring elements 2 could also deviate from the shape of ring shaped segments in other ways. For example, the outer contour of intermediate ring elements 2, which form the lateral walls of ventilation ducts 6, could be oriented in such a way that the width of the ventilation
4 ducts decreases from radially inward to radially outward, so that the air flowing through them increases in flow velocity outward. Or said outer contours could deviate from the straight shape, so that the described progression of the lateral walls is additionally curved. Furthermore, the corners of intermediate ring elements 2 could be rounded. Intermediate ring elements 2 may have surfaces on the outer and/or inner diameter to improve the initial assembly.
Figure 4 shows an enlarged view of intermediate ring element 2. The design of intermediate ring element 2 shown in Figure 4 is to be regarded as optional.
In regions where it follows the outer contour of the annular plates, intermediate ring element 2 shown is slightly set back from this outer contour, which is represented by dashed lines. The installation position of intermediate ring elements 2 is determined by the alignment of the bores for tension bolts 3 and/or possible machined surfaces on the inner and outer diameters. However, a certain oversize of the corresponding bores is unavoidable so that tension bolts 3 can be inserted without problems. This in turn results in a certain amount of play for the position of intermediate ring elements 2.
During installation, these are aligned so that the inner contour of intermediate ring elements 2 is flush with the annular plates. The undersize on the outside prevents intermediate ring elements 2 from protruding beyond the outer contour of the annular plates on the outside if they should be displaced outward by centrifugal force during operation of the electrical machine. Said undersize must be at least as large as the clearance of the holes in relation to tension bolts 3.
Figure 5a shows a further detail of an intermediate ring element 2 according to the invention. Intermediate ring elements 2 according to the invention rest against adjacent annular plates 1 with only part of their axially oriented surface. In Figure 5a, the part of the axially oriented surface in contact with annular plates 1 is shown hatched. In the embodiment shown, these are two ring shaped segments, one ring shaped segment being arranged radially outside and the other radially inside the bores for tension bolts 3. The shape of the adjoining segment of the axially oriented surface shown is only one of many possibilities.
Figure 6 shows a section through intermediate ring element 2 shown in Figure 5a in a cross-section along the line C-C. From this it is evident that adjoining section 7 is raised in relation to the remaining axially oriented surface of intermediate ring element 2, and that adjoining sections 7 located above and below respective annular plate 1 are positioned opposite each other in the axial direction.
The fact that intermediate ring elements 2 are in contact with adjacent annular plates 1 with only part 7 of their surface has the advantage that only in this part 7 the surface must meet the specified flatness tolerances, while the part of the surface that is not in contact can be manufactured with less precision.
Alternative designs of adjoining partial surface 7 to the shape shown in Figures 5a and 6 could, for example, consist of several circular, oval, rectangular or otherwise shaped partial surfaces arranged in any number and combination around the holes for tension bolts 3. Figure 5b shows such an alternative configuration in the form of circular rings extending around the holes.
Figure 7 shows another optional feature of an intermediate ring element 2 in the same format of representation as Figure 6. The surface of intermediate ring element arranged in the axial direction has a recess which is identified with number 8. Recess 8 obviously does not belong to the part of the surface which adjoins neighboring annular plates 1. The advantage of optional recess 8 is weight saving. This advantage is already achieved if only some of the intermediate ring elements 2 feature a recess 8.
Steel or aluminum can be used as the base material for intermediate ring elements 2.
Figure 8 shows a detail of a rotor rim according to the invention with a brake disk, which is designated 9. Brake disk 9 is advantageously arranged directly on the end faces of tension bolts 3 and fastened with screws that engage in tension bolts 3.
Alternatively, the brake disc can also be attached to the rotor support structure. The embodiment shown is suitable for single-component brake discs. If a segmented brake disc is to be used, a carrier disc can be mounted as shown in Figure 8, wherein the brake disc segments are then screwed onto the carrier disc with additional screws.
In conclusion, it should be noted that annular plates 1 can all have the same axial thickness, or that the individual annular plates can have different axial thicknesses. For example, in the embodiment shown in Figure 1, for example, the axially outer annular plates have a greater axial thickness than the inner annular plates. This specific embodiment advantageously allows the attachment of various parts located at the axial ends of the rotor, which are not shown in Figure 1. In general, it is advantageous if the axial thickness of the annular plates is adapted to the load occurring at the respective location. In other words, the higher the location-specific load, the greater the axial thickness of the annular plates arranged in that location.
Component identification listing 1 Annular plate 2 intermediate ring element 3 tension bolt 4 groove for accommodation of a rotor pole ventilation bore 6 ventilation duct 7 adjoining surface 8 recess 8 brake disc
Figure 4 shows an enlarged view of intermediate ring element 2. The design of intermediate ring element 2 shown in Figure 4 is to be regarded as optional.
In regions where it follows the outer contour of the annular plates, intermediate ring element 2 shown is slightly set back from this outer contour, which is represented by dashed lines. The installation position of intermediate ring elements 2 is determined by the alignment of the bores for tension bolts 3 and/or possible machined surfaces on the inner and outer diameters. However, a certain oversize of the corresponding bores is unavoidable so that tension bolts 3 can be inserted without problems. This in turn results in a certain amount of play for the position of intermediate ring elements 2.
During installation, these are aligned so that the inner contour of intermediate ring elements 2 is flush with the annular plates. The undersize on the outside prevents intermediate ring elements 2 from protruding beyond the outer contour of the annular plates on the outside if they should be displaced outward by centrifugal force during operation of the electrical machine. Said undersize must be at least as large as the clearance of the holes in relation to tension bolts 3.
Figure 5a shows a further detail of an intermediate ring element 2 according to the invention. Intermediate ring elements 2 according to the invention rest against adjacent annular plates 1 with only part of their axially oriented surface. In Figure 5a, the part of the axially oriented surface in contact with annular plates 1 is shown hatched. In the embodiment shown, these are two ring shaped segments, one ring shaped segment being arranged radially outside and the other radially inside the bores for tension bolts 3. The shape of the adjoining segment of the axially oriented surface shown is only one of many possibilities.
Figure 6 shows a section through intermediate ring element 2 shown in Figure 5a in a cross-section along the line C-C. From this it is evident that adjoining section 7 is raised in relation to the remaining axially oriented surface of intermediate ring element 2, and that adjoining sections 7 located above and below respective annular plate 1 are positioned opposite each other in the axial direction.
The fact that intermediate ring elements 2 are in contact with adjacent annular plates 1 with only part 7 of their surface has the advantage that only in this part 7 the surface must meet the specified flatness tolerances, while the part of the surface that is not in contact can be manufactured with less precision.
Alternative designs of adjoining partial surface 7 to the shape shown in Figures 5a and 6 could, for example, consist of several circular, oval, rectangular or otherwise shaped partial surfaces arranged in any number and combination around the holes for tension bolts 3. Figure 5b shows such an alternative configuration in the form of circular rings extending around the holes.
Figure 7 shows another optional feature of an intermediate ring element 2 in the same format of representation as Figure 6. The surface of intermediate ring element arranged in the axial direction has a recess which is identified with number 8. Recess 8 obviously does not belong to the part of the surface which adjoins neighboring annular plates 1. The advantage of optional recess 8 is weight saving. This advantage is already achieved if only some of the intermediate ring elements 2 feature a recess 8.
Steel or aluminum can be used as the base material for intermediate ring elements 2.
Figure 8 shows a detail of a rotor rim according to the invention with a brake disk, which is designated 9. Brake disk 9 is advantageously arranged directly on the end faces of tension bolts 3 and fastened with screws that engage in tension bolts 3.
Alternatively, the brake disc can also be attached to the rotor support structure. The embodiment shown is suitable for single-component brake discs. If a segmented brake disc is to be used, a carrier disc can be mounted as shown in Figure 8, wherein the brake disc segments are then screwed onto the carrier disc with additional screws.
In conclusion, it should be noted that annular plates 1 can all have the same axial thickness, or that the individual annular plates can have different axial thicknesses. For example, in the embodiment shown in Figure 1, for example, the axially outer annular plates have a greater axial thickness than the inner annular plates. This specific embodiment advantageously allows the attachment of various parts located at the axial ends of the rotor, which are not shown in Figure 1. In general, it is advantageous if the axial thickness of the annular plates is adapted to the load occurring at the respective location. In other words, the higher the location-specific load, the greater the axial thickness of the annular plates arranged in that location.
Component identification listing 1 Annular plate 2 intermediate ring element 3 tension bolt 4 groove for accommodation of a rotor pole ventilation bore 6 ventilation duct 7 adjoining surface 8 recess 8 brake disc
Claims (9)
1. Rotor rim for an electric machine having at least two solid annular plates (1), wherein two of the annular plates (1) are arranged in axial direction on the outside and any given number of annular plates (1) are arranged between outer annular plates (1) and having a plurality of axially oriented tension bolts (3) which connect annular plates (1) to one another, wherein on the outer circumference of annular plates (1) grooves are arranged for accommodating a number of rotor poles, and wherein for each rotor pole at least two tension bolts (3) are provided, and wherein between each two adjacent annular plates (1) respectively a layer of intermediate ring elements (2) is arranged, wherein each layer comprises exactly one intermediate ring element (2) per rotor pole, and wherein intermediate ring elements (2) are arranged in such a way that between each two adjacent intermediate ring elements (2) a ventilation duct (6) is formed which extends from the inside of the rotor rim to the outer circumference of the rotor rim where it opens into the space between the rotor poles, characterized in that, each intermediate ring element (2) is penetrated by at least two tension bolts (3) and only abuts with a part (7) of its axially oriented surface against respectively adjacent annular plates (1), wherein abutting part (7) of the axially oriented surface is designed in each case to be raised with respect to the remaining part of the axially oriented surface of same intermediate ring element (2).
2. Rotor rim according to claim 1, wherein at least a part of the annular plates (1) has ventilation holes (5) which extend from the interior of the rotor rim to the outer circumference of the rotor rim where, in each case, they open into the space located between the rotor poles.
3. Rotor rim according to claim 1 or 2, wherein intermediate ring elements (2) each have the shape of a ring shaped segment and have a recess on the outer contour in the region of the grooves for accommodation of the rotor poles and in this region at least partially do not follow the outer contour of annular plates (1).
4. Rotor rim according to any one of the preceding claims, wherein at least part of intermediate ring elements (2) is designed such that the surface of said intermediate ring elements (2) arranged in the axial direction has a recess.
5. Rotor rim according to any one of the preceding claims, wherein the rotor rim comprises a brake disc (9), and wherein brake disc (9) is arranged directly on the end faces of tension bolts (3) and is fastened by screws engaging tension bolts (3).
6. Rotor rim according to any one of claims 1 to 4, wherein the rotor rim comprises a carrier disc and a segmented brake disc (9), and wherein the carrier disc is arranged directly on the end faces of tension bolts (3) and is fastened by screws engaging in tension bolts (3), and wherein the segments of brake disc (9) are connected with the carrier disc by screws.
7. Rotor rim according to any one of the preceding claims, wherein annular plates (1) all have the same axial thickness.
8. Rotor rim according to any one of the claims 1 to 6, wherein annular plates (1) have different axial thickness.
9. Rotor rim according to the preceding claim, wherein axially outer annular plates (1) have a greater axial thickness than axially inner annular plates (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020133287.4 | 2020-12-14 | ||
| DE102020133287.4A DE102020133287B3 (en) | 2020-12-14 | 2020-12-14 | Rotor rim for an electrical machine |
| PCT/EP2021/076946 WO2022128192A1 (en) | 2020-12-14 | 2021-09-30 | Rotor rim for an electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3201545A1 true CA3201545A1 (en) | 2022-06-23 |
Family
ID=78078229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3201545A Pending CA3201545A1 (en) | 2020-12-14 | 2021-09-30 | Rotor rim for an electric machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230336042A1 (en) |
| CN (1) | CN116636115A (en) |
| AU (1) | AU2021402026A1 (en) |
| CA (1) | CA3201545A1 (en) |
| DE (1) | DE102020133287B3 (en) |
| WO (1) | WO2022128192A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NO116861B (en) | 1968-02-02 | 1969-06-02 | Olav Aasgaard | |
| JPS5154204A (en) | 1974-11-08 | 1976-05-13 | Hitachi Ltd | Kaitendenkino totsukyokugatakaitenshi |
| JP2776905B2 (en) | 1989-08-16 | 1998-07-16 | 株式会社日立製作所 | Variable speed generator |
| DE19515260A1 (en) | 1995-04-26 | 1996-10-31 | Abb Management Ag | Vertical axis electric hydropower machine |
| CN101752917B (en) | 2010-01-05 | 2011-06-15 | 昆明电机厂有限公司 | Bracket type solid magnet yoke of water-wheel generator |
| ES2528273T3 (en) | 2012-03-16 | 2015-02-06 | Alstom Renewable Technologies | Rotor for an electrodynamic machine |
| JP5840071B2 (en) * | 2012-05-10 | 2016-01-06 | 三菱電機株式会社 | Method for manufacturing laminated core of electric motor |
| CN106787596A (en) | 2016-12-08 | 2017-05-31 | 王良 | Vertical impulse generator set structure |
| CN109921526B (en) | 2019-04-18 | 2020-11-06 | 哈尔滨电机厂有限责任公司 | Magnetic yoke structure of annular forging of generating motor |
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2020
- 2020-12-14 DE DE102020133287.4A patent/DE102020133287B3/en active Active
-
2021
- 2021-09-30 CA CA3201545A patent/CA3201545A1/en active Pending
- 2021-09-30 AU AU2021402026A patent/AU2021402026A1/en active Pending
- 2021-09-30 WO PCT/EP2021/076946 patent/WO2022128192A1/en active Application Filing
- 2021-09-30 CN CN202180083807.4A patent/CN116636115A/en active Pending
-
2023
- 2023-06-14 US US18/334,656 patent/US20230336042A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020133287B3 (en) | 2022-01-27 |
| CN116636115A (en) | 2023-08-22 |
| US20230336042A1 (en) | 2023-10-19 |
| EP4260437A1 (en) | 2023-10-18 |
| WO2022128192A1 (en) | 2022-06-23 |
| AU2021402026A1 (en) | 2023-07-06 |
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